Measurement and Analysis of Sound Speed Dispersion During SAX04

Abstract

Results from a previous ONR funded experiment, SAX99, suggested that the speed of sound travelling through marine sediments might depend on the frequency of ensonification when the seabed is principally composed of sand (Williams et al., 2002). This dispersion behaviour contradicts a long-standing assumption, based on earlier compilations of experimental evidence (eg. Hamilton, 1980), that the compressional sound speed is independent of frequency. Sound speed dispersion measurements provide a fundamental metric for evaluating competing theories, some new and some revived (as summarized in Williams et al., 2002), that seek to explain the physics of how sound propagates in marine sediments as they predict different sound speed dispersion relationships

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 2005
Accession Number
ADA572529

Entities

People

  • John C. Osler
  • Paul C. Hines

Organizations

  • Defence Research and Development Canada

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Impedance
  • Acoustics
  • Angle Of Arrival
  • Angle Of Incidence
  • Data Analysis
  • Data Processing
  • Dispersions
  • Frequency
  • Frequency Bands
  • Frequency Domain
  • Frequency Response
  • Geometry
  • Grazing Angles
  • Measurement
  • Nova Scotia
  • Radiated Noise
  • Sediments

Readers

  • Acoustical Oceanography.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Theoretical Analysis.